基于转接节点的可靠多媒体多播协议

Reliable Multicast Protocol for Multimedia Based on Relay Nodes Mechanism

研讨了多媒体多播应用中的允许延迟和分组丢失率问题,提出了一种基于转接节点概念的可靠多播协议(RMPRM)。RMPRM协议聚焦在允许延迟上提供多媒体服务质量保证,转接节点放置在多播树上,数据恢复在两个转接节点之间进行。RMPRM协议转接能满足重传需求和减少分组的复制数量。给出了RMPRM协议与不可靠多播协议的比较。仿真实验表明,该协议具有较高的传输率和较低的端到端的传输延迟。

This paper discusses the multimedia multicast application problem with allowable delay and high packet loss rate. It proposes a new reliable multicast protocol based on relay nodes mechanism （RMPRM）. The RMPRM protocol focuses on allowable delay provides quality of service （QoS） for multimedia. Relay nodes are placed along the muhicast tree. Data recovery is done between relay nodes. This paper proposes the methods that enable protocol relays to request retransmission immediately and reduce the number of duplicate packets. It compares the RMPRM with non-reliable muhicast protocols. Simulation results show that the RMPRM has high delivery ratio and low end-to-end delay for packet transmission.